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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main(String[] args){
  11.     int answer;
  12.     Scanner scan = new Scanner(System.in);
  13.     String input;
  14.     System.out.println("Enter your operation please");
  15.     input = scan.nextLine();
  16.     if(input.charAt(findsign(input))=='+'){
  17.         answer = firstnumber(input)+secondnumber(input);
  18.         System.out.println("Operation is addition");
  19.         System.out.println("The answer is " + answer);
  20.     }
  21.     else if(input.charAt(findsign(input))=='-'){
  22.         answer = firstnumber(input)-secondnumber(input);
  23.         System.out.println("Operation is subtraction");
  24.         System.out.println("The answer is " + answer);
  25.     }
  26.     else if(input.charAt(findsign(input))=='*'){
  27.         answer = firstnumber(input)*secondnumber(input);
  28.         System.out.println("Operation is multiplication");
  29.         System.out.println("The answer is " + answer);
  30.     }
  31.     else if(input.charAt(findsign(input))=='/'){
  32.         answer = firstnumber(input)/secondnumber(input);
  33.         System.out.println("Operation is division");
  34.         System.out.println("The answer is " + answer);
  35.     }
  36.  
  37. }
  38.  
  39. public static int findsign(String input){
  40.     int n=0;
  41.     for (n=0;n<input.length();n++){
  42.         if(input.charAt(n)=='+' || input.charAt(n)=='-' || input.charAt(n)=='*' || input.charAt(n)=='/'){
  43.             break;
  44.         }
  45.     }
  46.     return n;
  47. }
  48. public static int firstnumber(String input){
  49.  
  50.         String number1 = input.substring(0,findsign(input));
  51.         int number = Integer.parseInt(number1);
  52.         return number;
  53.     }
  54. public static int secondnumber(String input){
  55.     String number2 = input.substring(findsign(input)+1,input.length());
  56.     int number = Integer.parseInt(number2);
  57.     return number;
  58. }
  59.  
  60. }
Success #stdin #stdout 0.13s 321344KB
comments (?)
stdin 
13*4
stdout 
Enter your operation please
Operation is multiplication
The answer is 52
https://ideone.com/JRal45
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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